Methods and apparatuses for receiving and transmitting configuration information and communication system

ABSTRACT

Methods and apparatuses for receiving and transmitting configuration information and a communication system. The method includes: configuring or predefining one or more transmission configuration indication states by a terminal equipment for one or more demodulation reference signal port groups. Hence, even in scenarios such as multiple TRPs or multiple panels, the receiving device may correctly and punctually receive transmission information transmitted by the transmitting device.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.16/918,533, filed on Jul. 1, 2020, which is a continuation applicationof International Application No. PCT/CN2018/076511, filed on Feb. 12,2018, the contents of which are incorporated herein by reference.

TECHNICAL FIELD

This disclosure relates to the field of communication technologies, andin particular to methods and apparatuses for receiving and transmittingconfiguration information and a communication system.

BACKGROUND

The massive multiple-input multiple-output (MIMO) technique is a keytechnique for new radio (NR) systems, and includes research on frequencybands below 6 GHz and above 6 GHz. As frequency bands increase, fadingand loss generated during transmission will increase accordingly. Thebeamforming technique has become a key technique in massive MIMO becauseit is able to effectively compensate for fading.

In the research of MIMO technique, in order to improve the reliabilityof transmission, the beamforming technique in which multiple beams aretransmitted simultaneously for physical channels (such as broadcastchannels, data channels, and control channels, etc.) is allowed. Sinceboth a network device and a user equipment (UE) have abilities totransmit and receive multiple beams, optimal combination of beamtransmission and reception may be obtained through beam management, suchas performing beam sweeping respectively by a receiving device and atransmitting device.

For example, downlink beam management in an NR system in the current3GPP (3rd Generation Partnership Project) includes three processes:

-   -   process 1 (P1): a base station transmits multiple different        beams, and a user equipment measures the beams and selects one        or more transmitting beams of better quality;    -   process 2 (P2): the base station transmits multiple different        beams; compared with process 1, the beams in process 2 are more        precise (narrow), which may be a smaller set of beams in process        1; and the UE measures the beams and selects transmitting beams        of better quality; and    -   process 3 (P3): the base station transmits multiple identical        beams, and the UE uses different receiving beams to receive,        thereby selecting one or more receiving beams of better quality.

It can be seen that through the three processes of beam management, theUE may obtain quality conditions of beam pair links (BPL) of multipledifferent beams of a transmitting device and multiple different beams ofa receiving device. The current NR system supports reporting of qualityof multiple transmitting beams by the UE, such as reporting the beam IDsof better quality and corresponding reference signal received power(RSRP) to the base station. The beam IDs may be represented by, forexample, resource IDs of a channel state information reference signal(CSI-RS) and/or time IDs of a synchronization signal (SS) block.

It should be noted that the above description of the background ismerely provided for clear and complete explanation of this disclosureand for easy understanding by those skilled in the art. And it shouldnot be understood that the above technical solution is known to thoseskilled in the art as it is described in the background of thisdisclosure.

SUMMARY

However, it was found by the inventors that in some cases, such asmultiple transmission points (referred to as multi-TRPs) or multipleantenna panels (referred to as multi-panels), incorrect reception oftransmission information due to inaccuracy of transmission configurationmay occur.

Embodiments of this disclosure provide methods and apparatuses forreceiving and transmitting configuration information and a communicationsystem, in which it is expected that even in scenarios such as multipleTRPs or multiple panels, the receiving device may correctly andpunctually receive transmission information transmitted by thetransmitting device.

According to a first aspect of the embodiments of this disclosure, thereis provided a method for receiving configuration information, including:

-   -   receiving by a terminal equipment configuration information        transmitted by a network device for configuring transmission;        and    -   configuring or predefining one or more transmission        configuration indication states for one or more demodulation        reference signal port groups by the terminal equipment based on        the configuration information.

According to a second aspect of the embodiments of this disclosure,there is provided an apparatus for receiving configuration information,including:

-   -   a receiving unit configured to receive configuration information        transmitted by a network device for configuring transmission;        and    -   a configuring unit configured to configure or predefine one or        more transmission configuration indication states for one or        more demodulation reference signal port groups based on the        configuration information.

According to a third aspect of the embodiments of this disclosure, thereis provided a method for transmitting configuration information,including:

-   -   transmitting configuration information for configuring        transmission by a network device to a terminal equipment, the        configuration information being used by the terminal equipment        to configure or predefine one or more transmission configuration        indication states for one or more demodulation reference signal        port groups.

According to a fourth aspect of the embodiments of this disclosure,there is provided an apparatus for transmitting configurationinformation, including:

-   -   a transmitting unit configured to transmit configuration        information for configuring transmission to a terminal        equipment, the configuration information being used by the        terminal equipment to configure or predefine one or more        transmission configuration indication states for one or more        demodulation reference signal port groups.

According to a fifth aspect of the embodiments of this disclosure, thereis provided a communication system, including:

-   -   a terminal equipment, including the method for receiving        configuration information as described above; and    -   a network device, including the method for transmitting        configuration information as described above.

An advantage of the embodiments of this disclosure exists in that areceiving device configures or predefines one or more transmissionconfiguration indication (TCI) states for one or more demodulationreference signal (DMRS) port groups. Hence, even in scenarios such asmultiple TRPs or multiple panels, the receiving device may correctly andpunctually receive transmission information transmitted by atransmitting device.

With reference to the following description and drawings, the particularembodiments of this disclosure are disclosed in detail, and theprinciple of this disclosure and the manners of use are indicated. Itshould be understood that the scope of the embodiments of thisdisclosure is not limited thereto. The embodiments of this disclosurecontain many alternations, modifications and equivalents within thescope of the terms of the appended claims.

Features that are described and/or illustrated with respect to oneembodiment may be used in the same way or in a similar way in one ormore other embodiments and/or in combination with or instead of thefeatures of the other embodiments.

It should be emphasized that the term “comprise/include” when used inthis specification is taken to specify the presence of stated features,integers, steps or components but does not preclude the presence oraddition of one or more other features, integers, steps, components orgroups thereof.

BRIEF DESCRIPTION OF THE DRAWINGS

Elements and features depicted in one drawing or embodiment of thedisclosure may be combined with elements and features depicted in one ormore additional drawings or embodiments. Moreover, in the drawings, likereference numerals designate corresponding parts throughout the severalviews and may be used to designate like or similar parts in more thanone embodiment.

FIG. 1 is a schematic diagram of a communication system of an embodimentof this disclosure;

FIG. 2 is a schematic diagram of a TCI state of an embodiment of thisdisclosure;

FIG. 3 is a schematic diagram of the method for receiving configurationinformation of an embodiment of this disclosure;

FIG. 4 is a schematic diagram of the method for transmitting andreceiving configuration information of an embodiment of this disclosure;

FIG. 5 is a schematic diagram of the method for transmittingconfiguration information of an embodiment of this disclosure;

FIG. 6 is a schematic diagram of the apparatus for receivingconfiguration information of an embodiment of this disclosure;

FIG. 7 is a schematic diagram of the apparatus for transmittingconfiguration information of an embodiment of this disclosure;

FIG. 8 is a schematic diagram of the network device of an embodiment ofthis disclosure; and

FIG. 9 is a schematic diagram of the terminal equipment of an embodimentof this disclosure.

DETAILED DESCRIPTION

These and further aspects and features of this disclosure will beapparent with reference to the following description and attacheddrawings. In the description and drawings, particular embodiments of thedisclosure have been disclosed in detail as being indicative of some ofthe ways in which the principles of the disclosure may be employed, butit is understood that the disclosure is not limited correspondingly inscope. Rather, the disclosure includes all changes, modifications andequivalents coming within the terms of the appended claims.

In the embodiments of this disclosure, terms “first”, and “second”,etc., are used to differentiate different elements with respect tonames, and do not indicate spatial arrangement or temporal orders ofthese elements, and these elements should not be limited by these terms.Terms “and/or” include any one and all combinations of one or morerelevantly listed terms. Terms “contain”, “include” and “have” refer toexistence of stated features, elements, components, or assemblies, butdo not exclude existence or addition of one or more other features,elements, components, or assemblies.

In the embodiments of this disclosure, single forms “a”, and “the”,etc., include plural forms, and should be understood as “a kind of” or“a type of” in a broad sense, but should not defined as a meaning of“one”; and the term “the” should be understood as including both asingle form and a plural form, except specified otherwise. Furthermore,the term “according to” should be understood as “at least partiallyaccording to”, the term “based on” should be understood as “at leastpartially based on”, except specified otherwise.

In the embodiments of this disclosure, the term “communication network”or “wireless communication network” may refer to a network satisfyingany one of the following communication standards: long term evolution(LTE), long term evolution-advanced (LTE-A), wideband code divisionmultiple access (WCDMA), and high-speed packet access (HSPA), etc.

And communication between devices in a communication system may beperformed according to communication protocols at any stage, which may,for example, include but not limited to the following communicationprotocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and 5G andnew radio (NR) in the future, etc., and/or other communication protocolsthat are currently known or will be developed in the future.

In the embodiments of this disclosure, the term “network device”, forexample, refers to an equipment in a communication system that accessesa terminal equipment to the communication network and provides servicesfor the terminal equipment. The network device may include but notlimited to the following equipment: a base station (BS), an access point(AP), a transmission reception point (TRP), a broadcast transmitter, amobile management entity (MME), a gateway, a server, a radio networkcontroller (RNC), a base station controller (BSC), etc.

The base station may include but not limited to a node B (NodeB or NB),an evolved node B (eNodeB or eNB), and a 5G base station (gNB), etc.Furthermore, it may include a remote radio head (RRH), a remote radiounit (RRU), a relay, or a low-power node (such as a femto, and a pico,etc.). The term “base station” may include some or all of its functions,and each base station may provide communication coverage for a dedicatedgeographical area. And a term “cell” may refer to a base station and/orits coverage area, which is dependent on a context of the term.

In the embodiments of this disclosure, the term “user equipment (UE)” or“terminal equipment (TE)” refers to, for example, equipment accessing toa communication network and receiving network services via a networkdevice. The user equipment may be fixed or mobile, and may also bereferred to as a mobile station (MS), a terminal, a subscriber station(SS), an access terminal (AT), or a station, etc.

The terminal equipment may include but not limited to the followingdevices: a cellular phone, a personal digital assistant (PDA), awireless modem, a wireless communication device, a hand-held device, amachine-type communication device, a lap-top, a cordless telephone, asmart cell phone, a smart watch, and a digital camera, etc.

For another example, in a scenario of the Internet of Things (IoT),etc., the user equipment may also be a machine or a device performingmonitoring or measurement. For example, it may include but not limitedto a machine-type communication (MTC) terminal, a vehicle mountedcommunication terminal, a device to device (D2D) terminal, and a machineto machine (M2M) terminal, etc.

Furthermore, the term “a network side” or “a network device side” refersto a side at a network, may be a base station, and may include one ormore of the above network devices. And the term “a user equipment side”or “a terminal equipment side” refers to a side at a user equipment or aterminal equipment, may be a user equipment, and may include one or moreof the above terminal equipments.

Scenarios in the embodiments of this disclosure shall be described belowby way of examples; however, this disclosure is not limited thereto.

FIG. 1 is a schematic diagram of a communication system of an embodimentof this disclosure, in which a case where a terminal equipment and anetwork device are taken as examples is schematically shown. As shown inFIG. 1 , a communication system 100 may include a network device 101 anda terminal equipment 102. For the sake of simplicity, an example havingone terminal equipment and a network device is schematically given inFIG. 1 ; however, the embodiment of this disclosure is not limitedthereto. For example, the network device 101 may be multiple, so as toform multiple TRP transmission or multiple panel transmission.

In the embodiment of this disclosure, existing traffics or traffics thatmay be implemented in the future may be performed between the networkdevice 101 and the terminal equipment 102. For example, such trafficsmay include but not limited to an enhanced mobile broadband (eMBB),massive machine type communication (MTC), and ultra-reliable andlow-latency communication (URLLC), etc.

In this disclosure, after the network device obtains beams with betterquality reported by the terminal equipment, these beams may be used intransmission of physical channels (such as broadcast channels, datachannels, and control channels, etc.) to obtain relatively hightransmission quality. And the NR supports the network device to indicatethe used transmission beam to the terminal equipment, so that theterminal equipment may decide which reception beam is to be used foralignment and reception. In addition, the beam indication may beequivalent to a spatial quasi-co-location (QCL) indication, and may alsobe equivalent to an indication of a transmission configurationindication (TCI) state.

In the NR system, in performing beam indication for a physical downlinkcontrol channel (PDCCH), radio resource control (RRC) signaling and/ormedia access control (MAC) signaling (e.g. MAC-CE) may be used. Forexample, RRC signaling may be used to configure K TCI states for eachcontrol resource set (hereinafter referred to as a CORESET); for aCORESET, when K>1, MAC-CE is used to further activate a state in the KTCI states; and when K=1, there is no need to use MAC-CE for activation,and the TCI state configured by the RRC is the TCI state of the CORESET.When a piece of downlink control information (DCI) is transmitted, itsTCI state is in consistence with a TCI state of CORESET used in itsactual transmission.

In performing beam indication for a physical downlink shared channel(PDSCH), RRC signaling and/or a MAC-CE and/or DCI may be used. Forexample, M TCI states are configured via RRC signaling, the MAC-CEactivates 2{circumflex over ( )}N TCI states in M states, and in DCItransmission, N bits are used to indicate a TCI in 2{circumflex over( )}N states.

As reception beamforming in the analog domain is performed when a signalreaches an antenna element, for some symbols of a PDSCH, in performinganalog domain beamforming on it, TCI indication information contained inthe DCI may not be decoded, so it is not possible to select anappropriate reception beam for analog beamforming.

Therefore, a time offset threshold is defined in the NR, that is, when atime offset between the moment when DCI is received and a symbol of ascheduled PDSCH is less than a threshold, the terminal equipment assumesthat a TCI state of a PDSCH on the symbol is consistent with a TCI stateof a CORESET of a lowest ID in all CORESETs configured in this slot.When the time offset between the moment when the DCI is received and asymbol of the scheduled PDSCH is greater than or equal to a threshold,the terminal equipment assumes that the TCI state of the PDSCH on thesymbol is consistent with the TCI state indicated in the DCI. Incalculating the time offset, the time when the DCI is received may alsobe replaced with a fixed time that is clear to both the network deviceand the terminal equipment. A symbol of the PDSCH may be a firstorthogonal frequency division multiplexing (OFDM) symbol occupied by thescheduled PDSCH in the time dimension, or may be a first OFDM symbol ofthe scheduled PDSCH in each slot, that is, each slot calculates a timeoffset value, which is then compared with a time offset threshold.

In addition, the TCI state of the PDSCH may not be indicated. Whetherthe TCI state of the PDSCH is indicated may be dependent on a parameterTCI-PresentInDCI indicating a dynamic TCI state configured by a higherlayer. RRC signaling configures the parameter TCI-PresentInDCI for eachCORESET. When the parameter is enabled, it means that the DCItransmitted in the CORESET contains a TCI state indication field; andwhen the parameter is disabled, it means that the DCI transmitted inthis CORESET does not contain a TCI state indication field. When the TCIstate of the PDSCH is not indicated or the terminal equipment does notreceive the TCI state indication, a default TCI state needs to bedefined so that the network device and the terminal equipment mayperform transmission and reception of analog domain beams according tothe default TCI state.

FIG. 2 is a schematic diagram of the TCI state of the embodiment of thisdisclosure. As shown in FIG. 2 , when the time offset between the momentwhen the DCI is received and a symbol of the scheduled PDSCH is lessthan a threshold, the default DCI state is adopted, and the default DCIstate is a TCI state of a CORESET with the lowest ID in all the CORESETsconfigured in this slot, as shown in A and B in FIG. 2 ; whenTCI-PresentlnDCl is disabled and the time offset between the moment whenthe DCI is received and a symbol of the scheduled PDSCH is greater thanor equal to the threshold, the TCI state of the scheduled CORESET isused, as shown in C in FIG. 2 ; and when TCI-PresentlnDCl is enabled andthe time offset between the moment when the DCI is received and a symbolof the scheduled PDSCH is greater than or equal to the threshold, theTCI state indicated in DCI is adopted, as shown in D in FIG. 2 .

However, in multi-TRP or multi-panel scenarios, the default TCI state orQCL parameter of the PDSCH may be different from those in single-pointtransmission, and a case where the receiving device may not correctlyand punctually receive transmission information due to inaccuracy oftransmission configuration may occur in the receiving device (such as aUE).

In the following, the embodiments of this disclosure shall be describedby taking an NR system and a PDSCH as examples; however, this disclosureis not limited to this, and it may also be applied to any system orscenario where similar problems exist.

Embodiment 1

The embodiments of this disclosure provide a method for receivingconfiguration information. FIG. 3 is a schematic diagram of the methodfor receiving configuration information of the embodiment of thisdisclosure, in which a case at a terminal equipment side is shown. Asshown in FIG. 3 , the method includes:

-   -   step 301: a terminal equipment receives configuration        information transmitted by a network device for configuring        transmission; and    -   step 302: the terminal equipment configures or predefines one or        more transmission configuration indication states for one or        more demodulation reference signal port groups based on the        configuration information, respectively.

In an embodiment, the TCI state of the demodulation reference signalport group is configured or defined, for example, it may be predefinedin a standard, in which case step 301 is optional. In addition, it mayalso be configured by the network device via RRC signaling.

FIG. 4 is a schematic diagram of the method for transmitting andreceiving configuration information of an embodiment of this disclosure,further describing from the network device side and the terminalequipment side. As shown in FIG. 4 , the method includes:

-   -   step 401: the network device transmits RRC signaling including        configuration information to the terminal equipment;    -   step 402: the terminal equipment configures or predefines one or        more transmission configuration indication states for one or        more demodulation reference signal port groups based on the        configuration information.

As shown in FIG. 4 , the method may further include:

-   -   step 403: the network device transmits MAC signaling for        activating the transmission configuration indication states to        the terminal equipment; and/or    -   step 404: the network device transmits DCI for activating the        transmission configuration indication states to the terminal        equipment.

It should be noted that FIG. 4 only schematically illustrates theembodiment of this disclosure; however, this disclosure is not limitedthereto. For example, an order of execution of the steps may beappropriately adjusted, and furthermore, some other steps may be added,or some steps therein may be reduced. And appropriate variants may bemade by those skilled in the art according to the above contents,without being limited to what is contained in FIG. 4 .

Therefore, the receiving device configures or predefines one or more TCIstates for the DMRS port group; even in scenarios such as multiple TRPsor multiple panels, the receiving device may correctly and punctuallyreceive transmission information transmitted by the transmitting device.

In an embodiment, the terminal equipment may also determine the TCIstates and/or QCL parameter of the DMRS port group of one or morephysical channels according to the transmission scheme (TS) and/orparameter configured by the network device.

For example, in a multi-TRP and/or multi-panel scenario, the TS of theterminal equipment may be configured by a higher layer with parametersdifferent from those in single-point transmission. For example, in thesingle-point transmission, the TS of the terminal equipment may beconfigured as transmission scheme 1 (TS1) or transmission scheme 2(TS2); while in multi-TRP transmission, the TS of the terminal equipmentmay be configured as transmission scheme 3 (TS3), and in multi-paneltransmission, the TS of the terminal equipment may be configured astransmission scheme 4 (TS4); or, in multi-panel transmission, the TS ofthe terminal equipment may be configured as transmission scheme 3 (TS3),and in multi-TRP transmission, the TS of the terminal equipment may beconfigured as transmission scheme 4 (TS4); or, in multi-TRP ormulti-panel transmission, the TS of the terminal equipment may beconfigured as transmission scheme 3 (TS3), that is, the sametransmission scheme (TS).

For another example, instead of instructing the terminal equipment toperform single-point transmission or multi-point transmission via theconfigured transmission schemes (TSs), the terminal equipment isinstructed via other parameters configured by a higher layer to performoperations associated with multiple TRPs or multiple panels. Forexample, a parameter a configured by the higher layer is used toinstruct the terminal equipment to perform operations associated withsingle-point transmission, and a parameter b is used to instruct theterminal equipment to perform operations associated with multi-pointtransmission and/or multi-panel transmission.

For a further example, instead of explicitly indicating operationsassociated with multiple TRPs and/or multiple panels by using theparameters configured by the higher layer, the operations associatedwith multiple TRPs and/or multiple panels are implicitly indicated byusing the parameters configured by the higher layer and/or furtherindication of the MAC layer and/or further indication of the physicallayer. For example, when the above time offset is less than thethreshold, the TCI states or QCL parameters of n (n>=1) PDSCHsconfigured by the higher layer may be further activated or indicated byusing MAC signaling so as to determine the TCI states or QCL parametersof one or more PDSCHs. TCI states or QCL parameters of one or morePDSCHs finally configured via RRC or determined by other controlsignaling may implicitly reflect the TCI states or QCL parameters of thePDSCHs in single-point transmission or multi-point transmission ormulti-panel transmission.

For yet another example, when the above time offset is greater than orequal to the threshold and TCI-PresentlnDCl of the CORESET schedulingthe PDSCH is set to be enabled, the TCI states or QCL parameters of m(m>=1) PDSCHs configured by the higher layer may further be indicated byusing MAC signaling and/or physical layer signaling so as to determinethe TCI states or QCL parameters of the one or more PDSCHs. TCI statesor QCL parameters of one or more PDSCHs finally configured via RRC ordetermined by other control signaling may implicitly reflect the TCIstates or QCL parameters of the PDSCHs in single-point transmission ormulti-point transmission or multi-panel transmission.

That is, in a multi-TRP and/or multi-panel scenario(s), a transmissionscheme (for example, TS3 or TS4) may be explicitly configured for theterminal equipment, and different transmission schemes correspond todefault TCI states and/or QCL parameters of different PDSCHs. Forexample, when the above time offset is less than the threshold, or thetime offset is greater than or equal to the threshold andTCI-PresentlnDCl of the CORESET scheduling the PDSCHs is set to beenabled, the default TCI states or QCL parameters of the PDSCHs are allprovided in an agreement.

Or, in a multi-TRP and/or multi-panel scenario(s), when the above timeoffset is less than the threshold, or the above time offset is greaterthan or equal to the threshold and TCI-PresentInDCI of the CORESETscheduling the PDSCHs is set to enabled, the default TCI states and/orQCL parameters of the PDSCHs are configured by higher layer signaling,and may further be activated or indicated by MAC signaling and/orphysical layer signaling.

Thus, the TCI states and/or QCL parameters of the DMRS port group of oneor more physical channels are determined according to the TS and/orparameters configured by the network device, so that the multi-TRP ormulti-panel scheme may be transparent to the terminal equipment, therebyreducing processing complexity of terminal equipment.

In an embodiment, in the case where the time offset between the DCI andthe corresponding PDSCH is less than the preset threshold, one or moreDMRS port groups of the PDSCH are configured with or predefined asdefault TCI states. And this embodiment is directed to cases shown in Aand B in FIG. 2 .

For example, in a multi-TRP scenario, when the transmission mode isnon-coherent joint transmission (NC-JT), at least two DMRS port groupsare configured with or predefined as default TCI states; and when thetransmission mode is a dynamic point selection (DPS) mode, one DMRS portgroup is predefined as a default TCI state.

For example, when the time offset is less than the time offsetthreshold, the terminal equipment assumes that a TCI state of a CORESETwith a lowest CORESET-ID in a DMRS port group of the PDSCH and a TCIstate of a CORESET in the most recent slot are quasi co-located (QCL,i.e. the TCI states are identical). When the terminal equipment isscheduled by two or more TRPs, TCI states of PDSCHs scheduled bydifferent TRPs are different, and the TCI state of the CORESET with thelowest CORESET-ID may only be consistent with a TCI state of a PDSCHscheduled by one of the TRPs. In this case, if the TCI state of CORESETwith the lowest CORESET-ID is still used as the default TCI state whenthe time offset is less than the threshold, the terminal equipment mayonly receive a PDSCH transmitted by one TRP.

In an embodiment, antenna port of the DMRS port group of the PDSCH andone or more reference signal sets in one or more control resource setsare spatially quasi-co-located. For example, it may be directed to eachDMRS port group, or directed to some or all DMRS port groups.

For example, the one or more reference signal sets are at least tworeference signal sets to which an activated TCI state in the CORESETwith the lowest CORESET-ID corresponds. For example, in a multi-TRP ormulti-panel scenario, the TCI state of CORESET with the lowestCORESET-ID always corresponds to at least two RS sets after beingactivated by an MAC-CE, each RS set corresponding to a TCI states ofdifferent DMRS port groups.

That is, antenna ports in one or more DMRS port groups of the PDSCH andreference signals in one or more reference signal sets of the TCI stateof the CORESET with the lowest CORESET-ID used for PDCCH QCL indicationin a most recent slot configured with one or more CORESETs are QCL,respectively. For example, antenna ports in a first DMRS port group andreference signals in a first reference signal set of the TCI state ofthe CORESET with the lowest CORESET-ID used for PDCCH QCL indication inthe most recent slot configured with one or more CORESETs are QCL,antenna ports in a second DMRS port group and reference signals in asecond reference signal set of the TCI state of the CORESET with thelowest CORESET-ID used for PDCCH QCL indication in the most recent slotconfigured with one or more CORESETs are QCL, and so on.

For another example, the one or more reference signal sets are at leasttwo reference signal sets to at least two activated TCI states in theCORESET with the lowest CORESET-ID correspond. For example, the TCIstate of CORESET with the lowest CORESET-ID contains at least two afterbeing activated by an MAC-CE.

That is, the antenna ports in the one or more DMRS port groups of thePDSCH and the reference signal (set) in the one or more TCI states ofthe CORESET with the lowest CORESET-ID used for PDCCH QCL indication thein the recent slot configured with one or more CORESETs are QCL,respectively. For example, antenna ports in a first DMRS port group andreference signal (set) in a first TCI state of the CORESET with thelowest CORESET-ID used for PDCCH QCL indication in the most recent slotconfigured with one or more CORESETs are QCL, antenna ports in a secondDMRS port group and reference signal (set) in a second reference signalset of the TCI state of the CORESET with the lowest CORESET-ID used forPDCCH QCL indication in the most recent slot configured with one or moreCORESETs are QCL, and so on.

For a further example, the one or more reference signal sets are atleast two reference signal sets to which TCI states configured as beingof default in at least two CORESETs correspond. For example, TCI statesof two or more CORESETs may be simultaneously configured as default TCIstates, that is, two or more CORESET IDs are simultaneously configured,and the configured TCI states of multiple CORESETs take effect at thesame time.

That is, the antenna ports in the one or more DMRS port groups of thePDSCH and the reference signal (set) in TCI states having one or moreCORESET used for PDCCH QCL indication in the recent slot configured withone or more CORESETs are QCL, respectively. For example, antenna portsin a first DMRS port group and reference signal (set) of a first TCIstate of the CORESET with the lowest CORESET-ID used for PDCCH QCLindication in the most recent slot configured with one or more CORESETsare QCL, antenna ports in a second DMRS port group and reference signal(set) of a TCI state of the CORESET with a less lowest CORESET-ID usedfor PDCCH QCL indication in the most recent slot configured with one ormore CORESETs are QCL, and so on.

It should be noted that the above examples only schematically illustratethis disclosure, and the CORESET ID QCL with the antenna ports in theDMRS port groups is not limited thereto; for example, it may be thelowest CORESET-ID, and the less lowest CORESET-ID, etc., and thisdisclosure is not limited thereto.

Thus, in the case where the time offset between the moment when the DCIis received and the corresponding PDSCH is less than the presetthreshold, at least two DMRS port groups of the PDSCH are respectivelyconfigured with or predefined as the default TCI state; and in themulti-TRP scenario, when the time offset is less than the threshold, itmay be avoided that the terminal equipment can only receive a PDSCHtransmitted by one TRP.

In an embodiment, in a case where the terminal equipment is configuredto perform signal transmission with multiple transmission points, it isnot expected that a parameter indicating a dynamic TCI state (such asTCI-PresentlnDCl) of a control resource set used to transmit the DCI isnot enabled. This embodiment is directed to the case shown in C in FIG.2 .

For example, in a multi-TRP scenario, a PDCCH and a PDSCH scheduledthereby may be transmitted by different TRPs/cells. If TCI-PresentlnDClof a CORESET used in transmitting the PDCCH is set to be disabled, whenthe time offset is greater than the threshold, the terminal equipmentwill be in default that a TCI state of the PDSCH is consistent with aTCI state of the CORESET transmitting the PDCCH; while at this moment,the PDSCH may be transmitted by another TRP, and its TCI state isdifferent from the TCI state of the PDCCH.

In an embodiment, the terminal equipment does not expect that theparameter indicating the dynamic TCI state (such as TCI-PresentlnDCl) ofthe control resource set used for transmitting the DCI is disabled.

For example, the terminal equipment does not expect that all parametersindicating the dynamic TCI of multiple (e.g. all) control resource setsused for transmitting the DCI are disabled.

For another example, in a multi-TRP scenario, if a piece of DCI containsscheduling grants of multiple PDSCHs, the DCI may contain multiple TCIfields.

In an embodiment, when the parameter (such as TCI-PresentlnDCl) of thecontrol resource set transmitting the DCI used for indicating thedynamic TCI state is not enabled, the terminal equipment may furtheracquire a default TCI state from the DCI. One or more default TCI statesmay be configured via signaling transmitted by the network device,and/or, the one or more default TCI states may be predefined.

For example, as the default TCI state in this embodiment is the defaultstate after the above threshold, the DCI may already be successfullydecoded at this moment, hence the DCI may be used to indicate thedefault TCI state. That is, when TCI-PresentlnDCl carrying the CORESETof the DCI is disabled, the DCI may be used to indicate the default TCIstate.

For example, RRC signaling may be used to configure multiple defaultstates, including, for example, the same default state as thesingle-point transmission (the TCI state of the CORESET scheduling thePDSCH), and one or more other TCI states (for example, antenna ports inone or more DMRS ports of the PDSCH and a TCI state of a CORESET with aCORESET ID of i are QCL); and the DCI may be used again to indicate tothe terminal equipment which default TCI states of the PDSCH scheduledby DCI is the default TCI state configured by RRC signaling.

For another example, the mode of RRC plus DCI is still used forindication, but the default state same as that in the single-pointtransmission needs not to be configured, because this state is also aTCI state corresponding to a CORESET. Therefore, one or more TCI statesof a CORESET may be configured in the RRC as the default TCI state ofthe PDSCH. For example, IDs of CORESETs configured in a current slot arei, j, and k, respectively; hence, default TCI states configured by theRRC signaling are that: antenna ports in one or more DMRS port groups ofthe PDSCH and a TCI state of a CORESET with a CORESET ID i are QCL;antenna ports in one or more DMRS port groups of the PDSCH and a TCIstate of a CORESET with a CORESET ID j are QCL; antenna ports in one ormore DMRS port groups of the PDSCH and a TCI state of a CORESET with aCORESET ID k are QCL; and so on.

For a further example, a variety of default TCI states may be predefinedin a protocol. For example, TCI states of all CORESETs configured in acurrent slot may be taken as candidate default TCI states, hence, onlyDCI is needed for indication.

Therefore, even in a multi-TRP scenario, a PDCCH and a PDSCH scheduledthereby may be transmitted by different TRPs/cells, and the terminalequipment may correctly receive transmission information transmitted bythe multiple TRPs.

In an embodiment, in a multi-TRP scenario, non-coherent jointtransmission (NC-JT) and dynamic point selection (DPS) are dynamicallyswitched. From the perspective of the terminal equipment, a current TCIstatus and/or QCL parameter need to be correctly determined to correctlyreceive signals transmitted by multiple TRPs/antenna panels/cells.

For example, the terminal equipment may determine that at least two TCIstates of one or more DM-RS port groups of the PDSCH are valid. The atleast two valid TCI states may include: a TCI state activated accordingto indication information, and/or a default TCI state. For example, itmay include a TCI state activated according to the indicationinformation and a default TCI state, or may include two TCI statesactivated according to the indication information, or may include twodefault TCI states.

For example, at least two TCI states may come from multiple TRPs/antennapanels/cells, that is, regardless of whether a current transmission modeis NC-JT or DPS, the terminal equipment always assumes that beamindication from multiple TRPs/antenna panels/cells or default QCLparameters are all valid.

For another example, at an n-th slot, the terminal equipment receivesscheduling information indicating an (n+k)-th slot transmitted by thenetwork device, and determines the TCI state or the transmission schemeat the (n+k)-th slot according to the scheduling information; where, nis an integer greater than or equal to 0, and k is an integer greaterthan or equal to 1.

That is, it may be assumed that former k slots indicate a schedulingsituation of the current slot. For example, it is indicated in slot n-kthat PDSCH transmission of slot n contains DMRS port group 1, or containDMRS port group 2, or use DMRS port groups 1 and 2 simultaneously; andwhen a maximum number of DMRS port groups is greater than 2,corresponding indication fields will also be increased. That is,scheduling latency of k slots is allowed. Hence, the terminal equipmentneeds not to assume that beams transmitted by multiple TRPs come intooperation simultaneously; and especially in the DPS operation, energyconsumption of the terminal equipment may further be saved.

It should be noted that the above embodiments only illustrate someexamples of this disclosure. However, this disclosure is not limitedthereto, and appropriate variants may be made to these embodiments. Forexample, the above embodiments may be executed separately, or one ormore of them may be executed in a combined manner.

It can be seen from the above embodiments that the receiving deviceconfigures or predefines one or more TCI states for one or more DMRSport groups. Hence, even in scenarios such as multiple TRPs or multiplepanels, the receiving device may correctly and punctually receivetransmission information transmitted by the transmitting device.

Embodiment 2

The embodiments of this disclosure provide a method for transmittingconfiguration information, with contents identical to those inEmbodiment 1 being not going to be described herein any further.

FIG. 5 is a schematic diagram of the method for transmittingconfiguration information of the embodiment of this disclosure, in whicha case at a network device side is shown. As shown in FIG. 5 , themethod includes:

step 501: a network device transmits configuration information forconfiguring transmission to a terminal equipment, the configurationinformation being used by the terminal equipment to configure orpredefine one or more transmission configuration indication states forone or more demodulation reference signal port groups.

For example, the configuration information may be carried by RRCsignaling.

As shown in FIG. 5 , the method may further include:

-   -   step 502: the network device transmits medium access control        signaling and/or downlink control information for activating the        transmission control indication state to the terminal equipment.

It should be noted that FIG. 5 only schematically illustrates theembodiment of this disclosure; however, this disclosure is not limitedthereto. For example, an order of execution of the steps may beappropriately adjusted, and furthermore, some other steps may be added,or some steps therein may be reduced. And appropriate variants may bemade by those skilled in the art according to the above contents,without being limited to what is contained in FIG. 5 .

In an embodiment, the network device may configure a transmission schemeand/or one or more parameters for the terminal equipment. And theterminal equipment may determine the TCI status and/or QCL parameters ofthe DMRS port groups of one or more physical channels according to thetransmission scheme and/or parameters configured by the network device.

In an embodiment, when the time offset between the moment when the DCIis received and the corresponding PDSCH is less than a preset threshold,one or more DM-RS port groups of the PDSCH are configured with orpredefined as default TCI states. The antenna ports of the DMRS portgroup of the PDSCH and one or more reference signal sets in one or morecontrol resource sets are spatially quasi-co-located.

For example, the one or more reference signal sets may be at least tworeference signal sets to which an activated TCI state in a controlresource set with a lowest control resource set identificationcorresponds; or at least two reference signal sets to which at least twoactivated TCI states in a control resource set with a lowest controlresource set identification correspond; or at least two reference signalsets to which a default TCI state in at least two control resource setscorresponds.

In an embodiment, in a case where the terminal equipment is configuredto perform signal transmission with multiple transmission points, thenetwork device determines that the parameter of the control resource setused for transmitting the DCI indicating the dynamic TCI state is notdisabled.

In an embodiment, the network device determines that parameters ofmultiple (e.g. all) control resource sets for transmitting the DCIindicating the dynamic TCI state are not all disabled.

In an embodiment, when the parameters of the control resource sets fortransmitting the DCI indicating the dynamic TCI state are not disabled,the network device includes the default TCI state in the DCI. One ormore default TCI states may be configured via signaling transmitted bythe network device, and/or, the one or more default TCI states may alsobe predefined.

In an embodiment, the network device may transmit scheduling informationindicating an (n+k)-th slot in an n-th slot; and the terminal equipmentmay determine the TCI states or transmission scheme at the (n+k)-th slotaccording to the scheduling information.

It should be noted that the above embodiments only illustrate someexamples of this disclosure. However, this disclosure is not limitedthereto, and appropriate variants may be made to these embodiments. Forexample, the above embodiments may be executed separately, or one ormore of them may be executed in a combined manner.

It can be seen from the above embodiments that the transmitting devicetransmits the configuration information to the receiving device, suchthat the receiving device configures or predefines one or more TCIstates for one or more DMRS port groups. Hence, even in scenarios suchas multiple TRPs or multiple panels, the receiving device may correctlyand punctually receive transmission information transmitted by thetransmitting device.

Embodiment 3

The embodiments of this disclosure provide an apparatus for receivingconfiguration information. The apparatus may be, for example, a terminalequipment, or may be one or more components or assemblies configured ina terminal equipment. Contents in the embodiments identical to those inEmbodiment 1 shall not be described herein any further.

FIG. 6 is a schematic diagram of the apparatus for receivingconfiguration information of an embodiment of this disclosure. As shownin FIG. 6 , an apparatus 600 for receiving configuration informationincludes:

-   -   a receiving unit 601 configured to receive configuration        information transmitted by a network device for configuring        transmission; and    -   a configuring unit 602 configured to configure or predefine one        or more transmission configuration indication states for one or        more demodulation reference signal port groups based on the        configuration information.

For example, the configuration information is carried by RRC signaling.And the receiving unit 601 may further be configured to receive mediaaccess control signaling and/or downlink control information transmittedby the network device and used to activate the transmissionconfiguration indication state.

In an embodiment, as shown in FIG. 6 , the apparatus 600 for receivingconfiguration information may further include:

-   -   a determining unit 603 configured to determine transmission        configuration indication states and/or spatial quasi-co-location        parameters of demodulation reference signal port groups of one        or more physical channels according to a transmission scheme        and/or parameter configured by the network device.

In an embodiment, when an offset between the downlink controlinformation and a corresponding physical downlink shared channel is lessthan a predetermined threshold, one or more demodulation reference portgroups of the physical downlink shared channel are configured orpredefined with a default transmission configuration indication states.An antenna port of the demodulation reference port group of the physicaldownlink shared channel and one or more reference signal sets of one ormore control resource sets are spatially quasi-co-located.

For example, the one or more reference signal sets are at least tworeference signal sets corresponding to an activated transmissionconfiguration indication state in a control resource set having lowestcontrol resource set identification.

For example, the one or more reference signal sets are at least tworeference signal sets corresponding to at least two activatedtransmission configuration indication states in the control resource sethaving lowest control resource set identification.

For a further example, the one or more reference signal sets are atleast two reference signal sets corresponding to a transmissionconfiguration indication state configured as being of default in the atleast two control resource sets.

In an embodiment, the determining unit 603 may further be configured, ina case where a terminal equipment is configured to perform signaltransmission with multiple transmission points, not to expect that aparameter indicating a dynamic transmission configuration indicationstate of a control resource set for transmitting the downlink controlinformation is disabled.

In an embodiment, the determining unit 603 may further be not to expectthat parameters indicating dynamic transmission configuration indicationstates of multiple control resource sets for transmitting the downlinkcontrol information are disabled.

In an embodiment, as shown in FIG. 6 , the apparatus 600 for receivingconfiguration information may further include:

an acquiring unit 604 configured to, when a parameter indicating adynamic transmission configuration indication state of a controlresource set for transmitting the downlink control information isdisabled, acquire a default transmission configuration indication statefrom the downlink control information.

For example, one or more default transmission configuration indicationstates may be configured via signaling transmitted by the networkdevice, and/or the one or more default transmission configurationindication states may be predefined.

In an embodiment, the determining unit 603 may further be configured todetermine that at least two transmission configuration indication statesof one or more demodulation reference signal port groups of a physicaldownlink shared channel are valid. The at least two valid transmissionconfiguration indication states may include a transmission configurationindication state that is activated according to indication information,and/or, a default transmission configuration indication state.

In an embodiment, the receiving unit 601 may further be configured toreceive, at an n-th slot, scheduling information indicating an (n+k)-thslot transmitted by the network device; and the configuring unit 602 mayfurther be configured to determine the transmission configurationindication state or a transmission scheme at the (n+k)-th slot accordingto the scheduling information.

It should be noted that the components or modules related to thisdisclosure are only described above. However, this disclosure is notlimited thereto, and the apparatus 600 for receiving configurationinformation may further include other components or modules, andreference may be made to related techniques for particulars of thesecomponents or modules.

Furthermore, for the sake of simplicity, connection relationshipsbetween the components or modules or signal profiles thereof are onlyillustrated in FIG. 6 . However, it should be understood by thoseskilled in the art that such related techniques as bus connection, etc.,may be adopted. And the above components or modules may be implementedby hardware, such as a processor, a memory, a transmitter, and areceiver, etc., which are not limited in the embodiment of thisdisclosure.

It can be seen from the above embodiments that the receiving deviceconfigures or predefines one or more TCI states for one or more DMRSport groups. Hence, even in scenarios such as multiple TRPs or multiplepanels, the receiving device may correctly and punctually receivetransmission information transmitted by the transmitting device.

Embodiment 4

The embodiments of this disclosure provide an apparatus for transmittingconfiguration information. The apparatus may be, for example, a networkdevice, or may be one or more components or assemblies configured in anetwork device. Contents in the embodiments identical to those inEmbodiment 2 shall not be described herein any further.

FIG. 7 is a schematic diagram of the apparatus for transmittingconfiguration information of the embodiment of this disclosure. As shownin FIG. 7 , an apparatus 700 for transmitting configuration informationincludes:

-   -   a transmitting unit 701 configured to transmit configuration        information for configuring transmission to a terminal        equipment, the configuration information being used by the        terminal equipment to configure or predefine one or more        transmission configuration indication states for one or more        demodulation reference signal port groups.

For example, the configuration information is carried by RRC signaling.And the transmitting unit 701 may further be configured to transmitmedium access control signaling and/or downlink control information foractivating the transmission control indication state to the terminalequipment.

In an embodiment, the transmitting unit 701 may further be configured totransmit a transmission scheme and/or parameter, and the terminalequipment determines transmission configuration indication states and/orspatial quasi-co-location parameters of demodulation reference signalport groups of one or more physical channels according to thetransmission scheme and/or parameter configured by the network device.

In an embodiment, when the offset between the downlink controlinformation and the corresponding physical downlink shared channel isless than a preset threshold, one or more demodulation reference signalport groups of the physical downlink shared channel are configured withor pre-defined as default transmission configuration indication states.

In an embodiment, as shown in FIG. 7 , the apparatus 700 fortransmitting configuration information may further include:

-   -   a determining unit 702 configured to, in a case where the        terminal equipment is configured to perform signal transmission        with multiple transmission points, determine that the parameter        of the control resource set used for transmitting the downlink        control information indicating the dynamic transmission        configuration indication state is disabled.

In an embodiment, the determining unit 702 is further configured to:when the parameter of the control resource set used for transmitting thedownlink control information indicating the dynamic transmissionconfiguration indication state is disabled, contain the defaulttransmission configuration indication state in the downlink controlinformation.

In an embodiment, the transmitting unit 701 may further be configuredto: transmitting scheduling information indicating an (n+k)-th slot atan n-th slot; and the terminal equipment determines the transmissionconfiguration indication state or transmission scheme at the (n+k)-thslot according to the scheduling information.

It should be noted that the components or modules related to thisdisclosure are only described above. However, this disclosure is notlimited thereto, and the apparatus 700 for transmitting configurationinformation may further include other components or modules, andreference may be made to related techniques for particulars of thesecomponents or modules.

Furthermore, for the sake of simplicity, connection relationshipsbetween the components or modules or signal profiles thereof are onlyillustrated in FIG. 6 . However, it should be understood by thoseskilled in the art that such related techniques as bus connection, etc.,may be adopted. And the above components or modules may be implementedby hardware, such as a processor, a memory, a transmitter, and areceiver, etc., which are not limited in the embodiment of thisdisclosure.

It can be seen from the above embodiments that the transmitting devicetransmits the configuration information to the receiving device, suchthat the receiving device configures or predefines one or more TCIstates for one or more DMRS port groups. Hence, even in scenarios suchas multiple TRPs or multiple panels, the receiving device may correctlyand punctually receive transmission information transmitted by thetransmitting device.

Embodiment 5

The embodiments of this disclosure provide a communication system, andreference may be made to FIG. 1 , with contents identical to those inembodiments 1˜4 being not going to be described herein any further. Inan embodiment, the communication system 100 may include:

-   -   a network device 101, including the apparatus 700 for        transmitting configuration information as described in        Embodiment 4; and    -   a terminal equipment 102, including the apparatus 600 for        receiving configuration information as described in Embodiment        3.

The embodiment of this disclosure further provides a network device,which may be, for example, a base station. However, this disclosure isnot limited thereto, and it may also be another network device.

FIG. 8 is a schematic diagram of a structure of the network device ofthe embodiment of this disclosure. As shown in FIG. 8 , a network device800 may include a processor 810 (such as a central processing unit(CPU)) and a memory 820, the memory 820 being coupled to the processor810. The memory 820 may store various data, and furthermore, it maystore a program 830 for data processing, and execute the program 830under control of the processor 810.

For example, the processor 810 may be configured to execute the program830 to carry out the method for transmitting configuration informationdescribed in Embodiment 2. For example, the processor 810 may beconfigured to execute the following control: transmitting configurationinformation for configuring transmission to a terminal equipment, theconfiguration information being used by the terminal equipment toconfigure or predefine one or more transmission configuration indicationstates for one or more demodulation reference signal port groups.

In an embodiment, the configuration information is carried by radioresource control signaling.

In an embodiment, the processor 810 may further be configured to executethe following control: transmitting medium access control signalingand/or downlink control information for activating the transmissioncontrol indication state to the terminal equipment.

Furthermore, as shown in FIG. 8 , the network device 800 may include atransceiver 840, and an antenna 850, etc. Functions of the abovecomponents are similar to those in the relevant art, and shall not bedescribed herein any further. It should be noted that the network device800 does not necessarily include all the parts shown in FIG. 8 , andfurthermore, the network device 800 may include parts not shown in FIG.8 , and the relevant art may be referred to.

The embodiment of this disclosure further provides a terminal equipment;however, this disclosure is not limited thereto, and it may also beanother equipment.

FIG. 9 is a schematic diagram of the terminal equipment of theembodiment of this disclosure. As shown in FIG. 9 , a terminal equipment900 may include a processor 910 and a memory 920, the memory 920 storingdata and a program and being coupled to the processor 910. It should benoted that his figure is illustrative only, and other types ofstructures may also be used, so as to supplement or replace thisstructure and achieve a telecommunications function or other functions.

For example, the processor 910 may be configured to execute a program tocarry out the method for receiving configuration information describedin Embodiment 1. For example, the processor 910 may be configured toexecute the following control: configuring or predefining one or moretransmission configuration indication states for one or moredemodulation reference signal port groups.

In an embodiment, the processor 910 may further be configured to executethe following control: receiving configuration information transmittedby a network device for configuring transmission; the configurationinformation is carried by radio resource control signaling.

In an embodiment, the processor 910 may further be configured to executethe following control: receiving media access control signaling and/ordownlink control information transmitted by the network device and usedto activate the transmission configuration indication state.

In an embodiment, the processor 910 may further be configured to executethe following control: determining transmission configuration indicationstates and/or spatial quasi-co-location parameters of demodulationreference signal port groups of one or more physical channels accordingto a transmission scheme and/or parameter configured by the networkdevice.

In an embodiment, when an offset between the downlink controlinformation and a corresponding physical downlink shared channel is lessthan a predetermined threshold, one or more demodulation reference portgroups of the physical downlink shared channel are configured orpredefined with default transmission configuration indication states.

In an embodiment, an antenna port of the demodulation reference portgroup of the physical downlink shared channel and one or more referencesignal sets of one or more control resource sets are spatiallyquasi-co-located.

In an embodiment, the one or more reference signal sets are at least tworeference signal sets corresponding to an activated transmissionconfiguration indication state in a control resource set having lowestcontrol resource set identification.

In an embodiment, the one or more reference signal sets are at least tworeference signal sets corresponding to at least two activatedtransmission configuration indication states in the control resource sethaving lowest control resource set identification.

In an embodiment, the one or more reference signal sets are at least tworeference signal sets corresponding to a transmission configurationindication state configured as being of default in at least two controlresource sets.

In an embodiment, the processor 910 may further be configured to executethe following control: in a case where a terminal equipment isconfigured to perform signal transmission with multiple transmissionpoints, not expecting that a parameter indicating a dynamic transmissionconfiguration indication state of a control resource set fortransmitting the downlink control information is disabled.

In an embodiment, the processor 910 may further be configured to executethe following control: not expecting that parameters indicating dynamictransmission configuration indication states of multiple controlresource sets for transmitting the downlink control information aredisabled.

In an embodiment, the processor 910 may further be configured to executethe following control: when a parameter indicating a dynamictransmission configuration indication state of a control resource setfor transmitting the downlink control information is disabled, acquiringa default transmission configuration indication state from the downlinkcontrol information.

In an embodiment, one or more default transmission configurationindication states are configured via signaling transmitted by thenetwork device, and/or the one or more transmission configurationindication states are predefined.

In an embodiment, the processor 910 may further be configured to executethe following control: determining that at least two transmissionconfiguration indication states of one or more demodulation referencesignal port groups of a physical downlink shared channel are valid.

In an embodiment, the at least two valid transmission configurationindication states include a transmission configuration indication statethat is activated according to indication information, and/or, a defaulttransmission configuration indication state.

In an embodiment, the processor 910 may further be configured to executethe following control: at an n-th slot, receiving scheduling informationindicating an (n+k)-th slot transmitted by the network device; anddetermining the transmission configuration indication state or atransmission scheme at the (n+k)-th slot according to the schedulinginformation.

As shown in FIG. 9 , the terminal equipment 900 may further include acommunication module 930, an input unit 940, a display 950, and a powersupply 960; functions of the above components are similar to those inthe relevant art, which shall not be described herein any further. Itshould be noted that the terminal equipment 900 does not necessarilyinclude all the parts shown in FIG. 9 , and the above components are notnecessary. Furthermore, the terminal equipment 900 may include parts notshown in FIG. 9 , and the relevant art may be referred to.

An embodiment of this disclosure provides a computer readable program,which, when executed in a network device, will cause the network deviceto carry out the method for transmitting configuration informationdescribed in Embodiment 2.

An embodiment of this disclosure provides a storage medium, including acomputer readable program, which will cause a network device to carryout the method for transmitting configuration information described inEmbodiment 2.

An embodiment of this disclosure provides a computer readable program,which, when executed in a terminal equipment, will cause the terminalequipment to carry out the method for receiving configurationinformation described in Embodiment 1.

An embodiment of this disclosure provides a storage medium, including acomputer readable program, which will cause a terminal equipment tocarry out the method for receiving configuration information describedin Embodiment 1.

The above apparatuses and methods of this disclosure may be implementedby hardware, or by hardware in combination with software. Thisdisclosure relates to such a computer-readable program that when theprogram is executed by a logic device, the logic device is enabled tocarry out the apparatus or components as described above, or to carryout the methods or steps as described above. This disclosure alsorelates to a storage medium for storing the above program, such as ahard disk, a floppy disk, a CD, a DVD, and a flash memory, etc.

The methods/apparatuses described with reference to the embodiments ofthis disclosure may be directly embodied as hardware, software modulesexecuted by a processor, or a combination thereof. For example, one ormore functional block diagrams and/or one or more combinations of thefunctional block diagrams shown in the drawings may either correspond tosoftware modules of procedures of a computer program, or correspond tohardware modules. Such software modules may respectively correspond tothe steps shown in the drawings. And the hardware module, for example,may be carried out by firming the soft modules by using a fieldprogrammable gate array (FPGA).

The soft modules may be located in an RAM, a flash memory, an ROM, anEPROM, and EEPROM, a register, a hard disc, a floppy disc, a CD-ROM, orany memory medium in other forms known in the art. A memory medium maybe coupled to a processor, so that the processor may be able to readinformation from the memory medium, and write information into thememory medium; or the memory medium may be a component of the processor.The processor and the memory medium may be located in an ASIC. The softmodules may be stored in a memory of a mobile terminal, and may also bestored in a memory card of a pluggable mobile terminal. For example, ifequipment (such as a mobile terminal) employs an MEGA-SIM card of arelatively large capacity or a flash memory device of a large capacity,the soft modules may be stored in the MEGA-SIM card or the flash memorydevice of a large capacity.

One or more functional blocks and/or one or more combinations of thefunctional blocks in the drawings may be realized as a universalprocessor, a digital signal processor (DSP), an application-specificintegrated circuit (ASIC), a field programmable gate array (FPGA) orother programmable logic devices, discrete gate or transistor logicdevices, discrete hardware component or any appropriate combinationsthereof carrying out the functions described in this application. Andthe one or more functional block diagrams and/or one or morecombinations of the functional block diagrams in the drawings may alsobe realized as a combination of computing equipment, such as acombination of a DSP and a microprocessor, multiple processors, one ormore microprocessors in communication combination with a DSP, or anyother such configuration.

This disclosure is described above with reference to particularembodiments. However, it should be understood by those skilled in theart that such a description is illustrative only, and not intended tolimit the protection scope of this disclosure. Various variants andmodifications may be made by those skilled in the art according to theprinciple of this disclosure, and such variants and modifications fallwithin the scope of this disclosure.

For implementations of this disclosure containing the above embodiments,following supplements are further disclosed.

Supplement 1. A terminal equipment, including:

-   -   a configuring unit configured to configure or pre-define one or        more transmission configuration indication states for one or        more demodulation reference signal port groups.

Supplement 2. The terminal equipment according to supplement 1, whereinthe terminal equipment further includes:

-   -   a receiving unit configured to receive radio resource control        signaling including the configuration information transmitted by        the network device.

Supplement 3. The terminal equipment according to supplement 2, whereinthe receiving unit is further configured to receive media access controlsignaling and/or downlink control information transmitted by the networkdevice and used to activate the transmission configuration indicationstate.

Supplement 4. The terminal equipment according to supplement 2, whereinthe terminal equipment further includes:

a determining unit configured to determine transmission configurationindication states and/or spatial quasi-co-location parameters ofdemodulation reference signal port groups of one or more physicalchannels according to a transmission scheme and/or parameter configuredby the network device.

Supplement 5. The terminal equipment according to supplement 3, whereinwhen an offset between the downlink control information and acorresponding physical downlink shared channel is less than apredetermined threshold, one or more demodulation reference port groupsof the physical downlink shared channel are configured or predefinedwith default transmission configuration indication states.

Supplement 6. The terminal equipment according to supplement 5, whereinan antenna port of the demodulation reference port group of the physicaldownlink shared channel and one or more reference signal sets of one ormore control resource sets are spatially quasi-co-located.

Supplement 7. The terminal equipment according to supplement 6, whereinthe one or more reference signal sets are at least two reference signalsets corresponding to an activated transmission configuration indicationstate in a control resource set having lowest control resource setidentification.

Supplement 8. The terminal equipment according to supplement 6, whereinthe one or more reference signal sets are at least two reference signalsets corresponding to at least two activated transmission configurationindication states in the control resource set having lowest controlresource set identification.

Supplement 9. The terminal equipment according to supplement 6, whereinthe one or more reference signal sets are at least two reference signalsets corresponding to a transmission configuration indication stateconfigured as being of default in the at least two control resourcesets.

Supplement 10. A terminal equipment, including:

-   -   a determining unit configured, in a case where the terminal        equipment is configured to perform signal transmission with        multiple transmission points, not to expect that a parameter        indicating a dynamic transmission configuration indication state        of a control resource set for transmitting the downlink control        information is disabled.

Supplement 11. The terminal equipment according to supplement 10,wherein determining unit is further configured not to expect thatparameters indicating dynamic transmission configuration indicationstates of multiple control resource sets for transmitting the downlinkcontrol information are disabled.

Supplement 12. The terminal equipment according to supplement 10,wherein the terminal equipment further includes:

-   -   an acquiring unit configured to, when a parameter indicating a        dynamic transmission configuration indication state of a control        resource set for transmitting the downlink control information        is disabled, acquire a default transmission configuration        indication state from the downlink control information.

Supplement 13. The terminal equipment according to supplement 12,wherein one or more default transmission configuration indication statesare configured via signaling transmitted by the network device, and/orthe one or more transmission configuration indication states arepredefined.

Supplement 14. A terminal equipment, including:

-   -   a determining unit configured to determine that at least two        transmission configuration indication states of one or more        demodulation reference signal port groups of a physical downlink        shared channel are valid.

Supplement 15. The terminal equipment according to supplement 14,wherein the at least two valid transmission configuration indicationstates include a transmission configuration indication state that isactivated according to indication information, and/or, a defaulttransmission configuration indication state.

Supplement 16. A terminal equipment, including:

-   -   a receiving unit configured to receive, at an n-th slot,        scheduling information indicating an (n+k)-th slot transmitted        by a network device; and    -   a configuring unit configured to determine the transmission        configuration indication state or a transmission scheme at the        (n+k)-th slot according to the scheduling information.

What is claimed is:
 1. A terminal comprising: a receiver configured toreceive, from a network device, a first signal including configurationinformation; and a processor configured to configure a transmissionconfiguration indication state for a demodulation reference signal portgroup based on the configuration information, wherein the receiver isfurther configured to receive, from the network device, a second signalfor instructing activation the transmission configuration indicationstate, and when an offset between a downlink control information and aphysical downlink shared channel corresponding the downlink controlinformation is less than a predetermined threshold, the demodulationreference signal port group of the physical downlink shared channel isconfigured or predefined with a predetermined transmission configurationindication state.
 2. The terminal according to claim 1, wherein, theprocessor is further configured to configure a plurality of transmissionconfiguration indication states including the transmission configurationindication state, and the second signal is a signal for instructingactivation at least one of the plurality of transmission configurationindication states.
 3. The terminal according to claim 2, wherein, eachof plurality of transmission configuration indication states isconfigured for one or more demodulation reference signal port groupsincluding the demodulation reference signal port group.
 4. The terminalaccording to claim 1, wherein the processor is further configured toacquire, when a parameter indicating a dynamic transmissionconfiguration indication state of a control resource set fortransmitting the downlink control information is disabled, thepredetermined transmission configuration indication state based on aphysical downlink control channel.
 5. The terminal according to claim 1,wherein the processor is further configured to determine transmissionconfiguration indication states and/or spatial quasi-co-locationparameters of demodulation reference signal port groups of one or morephysical channels according to a transmission scheme and/or parameterconfigured by the network device.
 6. The terminal according to claim 1,wherein the demodulation reference signal port group of the physicaldownlink shared channel is quasi-co-located with the one or morereference signal sets related to quasi-co-location parameter(s) of acontrol resource set.
 7. The terminal according to claim 6, wherein theone or more reference signal sets are at least two reference signal setscorresponding to an activated transmission configuration indicationstate in a control resource set having lowest control resource setidentification.
 8. The terminal according to claim 6, wherein the one ormore reference signal sets are at least two reference signal setscorresponding to at least two activated transmission configurationindication states in the control resource set having lowest controlresource set identification.
 9. The terminal according to claim 6,wherein the one or more reference signal sets are at least two referencesignal sets corresponding to a transmission configuration indicationstate configured as being of predetermined in at least two controlresource sets.
 10. The terminal according to claim 1, wherein thereceiver is further configured to receive, at an n-th slot, from thenetwork device, scheduling information indicating an (n+k)-th slot, andthe processor is further configured to determine the transmissionconfiguration indication state or a transmission scheme at the (n+k)-thslot according to the scheduling information, where n is an integergreater than or equal to 0, and k is an integer greater than or equalto
 1. 11. The terminal according to claim 1, wherein the receiverconfigured to receive, from the network device, the second signal via amedia access control signaling.
 12. The terminal according to claim 1,wherein the downlink control information is transmitted via a physicaldownlink control channel.
 13. A network device comprising: a processorconfigured to generate configuration information that is used forconfiguring a transmission configuration indication state for ademodulation reference signal port group by a terminal; and atransmitter configured to: transmit, to the terminal, a first signalincluding the configuration information; and transmit, to the terminal,a second signal for instructing activation the transmissionconfiguration indication state, wherein when an offset between adownlink control information and a physical downlink shared channelcorresponding the downlink control information is less than apredetermined threshold, the demodulation reference signal port group ofthe physical downlink shared channel is configured or predefined with apredetermined transmission configuration indication state.
 14. Awireless network system comprising: a network device configured totransmit a first signal including configuration information; and aterminal configured to: receive the first signal from the networkdevice, and configure a transmission configuration indication state fora demodulation reference signal port group based on the configurationinformation, wherein the network device transmits, to the terminal, asecond signal for instructing activation the transmission configurationindication state, when an offset between a downlink control informationand a physical downlink shared channel corresponding the downlinkcontrol information is less than a predetermined threshold, thedemodulation signal reference port group of the physical downlink sharedchannel is configured or predefined with a predetermined transmissionconfiguration indication state.